Performance Regression or Improvement: gbk_python_batch_load_test_fanout_8_times_with_2GB_10byte_records_total:runtime

[github-actions]

Performance change found in the
test: gbk_python_batch_load_test_fanout_8_times_with_2GB_10byte_records_total for the metric: runtime.

For more information on how to triage the alerts, please look at
Triage performance alert issues section of the README.

Test description: GroupByKey Python Load test - fanout 8 times with 2GB 10-byte records total
python | GBK | Fanout 8
Test Dashboard - http://metrics.beam.apache.org/d/UYZ-oJ3Zk/gbk-load-tests?orgId=1&var-processingType=batch&var-sdk=python&from=now-90d&to=now&viewPanel=6
Test link -

beam/.test-infra/jenkins/job_LoadTests_GBK_Python.groovy

Line 129 in 5e38dec

test : 'apache_beam.testing.load_tests.group_by_key_test',

timestamp: Sun Sep 20 17:31:38 2026, metric_value: 46.00
timestamp: Sat Sep 19 17:22:47 2026, metric_value: 116.00
timestamp: Fri Sep 18 17:45:15 2026, metric_value: 107.00 <---- Anomaly
timestamp: Thu Sep 17 17:25:45 2026, metric_value: 37.00
timestamp: Wed Sep 16 17:27:09 2026, metric_value: 39.00
timestamp: Tue Sep 15 17:40:24 2026, metric_value: 57.00
timestamp: Mon Sep 14 17:22:12 2026, metric_value: 90.00
timestamp: Sun Sep 13 17:40:00 2026, metric_value: 56.00
timestamp: Sat Sep 12 17:23:40 2026, metric_value: 59.00
timestamp: Fri Sep 11 17:23:33 2026, metric_value: 54.00
timestamp: Thu Sep 10 17:28:58 2026, metric_value: 56.00
timestamp: Wed Sep  9 17:29:44 2026, metric_value: 60.00
timestamp: Tue Sep  8 17:27:54 2026, metric_value: 61.00